Chock



'UNiTEo-STATES l 1,577,2ei

'ALBERT A.. COYLE AND WILLIAM S. MITCHELL, OF ST. LOUIS, MISSOURI.

CHOCK.

y Application led April 23, 1925. Serial No. 25,452.

rlhis invention relates to improvements in chock construction, and aims to provide a chock especially designed for heavy duty.

An important object of the invention is the provision of a chock so constructed that it will be exceptionally strong and durable, and one wherein the friction between the movable element and its support, is reduced to the minimum; thereby materially increasing the eiiciency of the chock.

A still further object of the invention is to provideva chock of this character constructed to withstand lateral strain usually directed tothe pin or spindle of a chock and to distribute the strain throughout the entire body of the chock base, to the end that the strength of the chock is greatly increased and the weight thereof decreased.

Another important' object of the vinvention is to provide means to facilitate ,the

lubricationof the working parts, the heus? ing being constructed to exclude foreign elements from the moving parts of the chock to reduce wear to the minimum.

lVith the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter de scribed and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, Without departing from the spirit of the invention. f Referring to the drawing:

Figure 1 is a vertical sectional view through a chock constructed in accordance with the invention.

vFigure 2 is a sectional view taken on linefsf-*Referring to the drawings in detail, vthe reference character 5 indicates the body portion of the chock, which is provided with a flange 6 at its base, which flange is formed with suitabley openings to accommodate the securing members 7 that also extend through i' the supporting surface 8, on which the chock is mounted.

The flange 6 is cut away defining a shoulder 9 and a roller supporting surface 10 Von which the rollers 11 are positioned, the rollers` being designed to engage the drum 1Q which is mounted on the base 5.

The upper end of the body portion 5 is cutaway defining a shoulder 13 on which the rollers 14 rest, the rollers being designed to engage the depending flange 15 formed on the upper end of the drum 12 so that lateral strain directed to the chock will be directed to the rollers 14: to the yend that the drum may move freely over the body portion 5.

vForming a part of the base 5 is a reduced end portion 16 which is threaded at 17 to receive the nut 18 which nut is adapted to contact with the drum to hold the drum in position on the base 5. Formed in the upper end of the drum 12 is an opening 19 through which a lubricant may be directed to the rollers 14 and 11. 1

As clearly shown by Figure 1 of the drawing, the chock is formed with a peripheral groove for the reception of a cable or rope to prevent the cable or rope used in connection with the chock from slipping upwardly from the chock when .strain is brought to bear thereon.

7e claim p Y In a device ef the character described, a body portionhaving a' flange formed atV its base,"said iange having a cut away portion defining a shoulder, and a substantiallyA flat supporting surface directly above the shoulder, a drum mounted on the body portion andr having a depending lower portion adapted'to operateradjacent to the shoulder,

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roller bearings mounted on the supporting roller bearings mounted on the body portion tion of the body portion to secure the drum adjacent to the upper end thereof, said to the body portion.

Hange adapted to engage the roller bearings In testimony that We claim the foregoing :1t the upper end of the body portion, said as our own, we have hereto eixed our signabody portion having a reduced upper end tures.

portion, and said drum having am opening ALBERT A. COYLE. to accommodate the reduced upper end por WM. S. MITCHELL. 

